323428109 has 2 divisors, whose sum is σ = 323428110. Its totient is φ = 323428108.

The previous prime is 323428087. The next prime is 323428117. The reversal of 323428109 is 901824323.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 319515625 + 3912484 = 17875^2 + 1978^2 .

It is an emirp because it is prime and its reverse (901824323) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 323428109 - 2²⁸ = 54992653 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (323428169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161714054 + 161714055.

It is an arithmetic number, because the mean of its divisors is an integer number (161714055).

Almost surely, 2^323428109 is an apocalyptic number.

It is an amenable number.

323428109 is a deficient number, since it is larger than the sum of its proper divisors (1).

323428109 is an equidigital number, since it uses as much as digits as its factorization.

323428109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 323428109 is about 17984.1071226792. The cubic root of 323428109 is about 686.4242015040.

The spelling of 323428109 in words is "three hundred twenty-three million, four hundred twenty-eight thousand, one hundred nine".